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학술대회 Pilot Structures for the Uplink Single Carrier FDMA Transmission Systems
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정병장, 정현규
Vehicular Technology Conference (VTC) 2008 (Spring), pp.2552-2556
08MM1100, 4세대 이동통신을 위한 적응 무선접속 및 전송 기술개발, 김영진
Single Carrier FDMA has been recently considered as a promising uplink transmission scheme for next generation mobile communications due to its low peak-to-average power ratio. Low PAPR characteristic should be maintained not only for data transmission period but also for pilot period. Therefore, the pilot channel should be carefully designed in consideration of low PAPR requirement as well as channel estimation performance and pilot overhead. In this paper, we present a novel time-division multiplexed pilot structure for uplink SC-FDMA systems. The proposed pilot structure can preserve full frequency resolution despite the fact that it is transmitted through a shortened block in the time domain. Consequently, the proposed pilot structure can provide better channel estimation compared to a conventional structure. It is shown through simulations that the proposed pilot structure outperforms conventional methods. © 2008 IEEE.
KSP 제안 키워드
Channel estimation(CE), Conventional methods, Data transmission, Frequency Resolution, Low PAPR, Peak-to-Average-Power-Ratio(PAPR), Pilot channel, Single carrier FDMA, Single carrier Frequency Division Multiple Access(SCFDMA), Single-carrier(SC), Transmission scheme